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Engineering Graphics with AutoCad

Course developers

Course abstract

The aim of the course is to create and develop geometrical logic, spatial thinking and imagination, to get acquainted with the terminology of engineering graphics, to obtain extended understanding on the concept of computer aided design and spheres of usage in solving of engineering problems, as well as basic principles of computer aided system selection, to promote the use of standards (LVS, ISO, etc.) in creation of technical documentation. Practically students acquire the possibilities of drawing of different components using AutoCAD software package.

Learning outcomes and their assessment

Knowledge – understands the projection method, view and section view creation principles. Familiar with the drawings related standards (ISO, LVS, etc.). Knows the types of components and the corresponding work documentation and its execution sequence. Able to explain the drawing and to add dimensions and annotations of threads, surface roughness and material. Knowledge on the concept of computer aided design and spheres of different CAD system application, the basic principles of computer aided systems selection. Knowledge is assessed in Test 1 and laboratory works.
Skills – can accomplish part working drawings, axonometric views, perform drawings of dismountable and rigid assemblies and bill of materials for it, as well as read assembly drawings and detailing them according LVS, EN, ISO, etc. standards. Skills to choose an appropriate software application related to the computer aided design sphere basing on the problem nature, to use the software in creating of technical documentation. Able to work with standardized product library elements. Skills are assessed in Homework 1 and 2, Test 2 and laboratory works.
Competence, working in group or independently, to use the information technology facilities for the solving of engineering problems and to manage them, as well as to convince others and argue own viewpoint. Competences are assessed in laboratory works and tests.

Course Content(Calendar)

1. Overview and demonstration of software, hardware and auxiliaries used in computer aided design. – 2 h
2. Drawing and modifying simple lines and shapes. Preparation of title block. Defining and applying layers. Use of templates in drawing. Saving the template. Drawing rules – line types, fonts for technical drawings. – 6 h
3. Views of drawings. Modifying simple shapes. Using snaps (object, ortho, polar, grid). Drawing of the prismatic detail. – 4 h
4. Displaying dimensions in drawings. Defining dimension styles. – 2 h
5. Construction of axonometric image in Isometric Drafting mode. – 2 h
6. Sections in drawings. Hatching. – 4 h
7. Construction of joints and arrays. – 4 h
8. Representation of threads in drawings. Surface texture. Drawing of a threaded component. – 4 h
9. Placing of typical blocks in the drawing. Block creation, editing. Copying of styles and layers from other drawings. Preparation and printing of drawing output. – 2 h
10. Test. Drawing of the prismatic detail. Views, dimensions, axonometry. Dimensions, surface roughness, threads. – 4 h
11. Creating 3-D models. 3-D coordinate systems. Views. – 4 h
12. Tools for building and editing of full-size models, planar and curved surfaces. Visualization of 3-D objects. – 2 h
13. Drawing of the casted detail. Axonometry. Fits and tolerances in drawings. – 4 h
14. Assembly drawing. Selection of standardized parts from the AutoCAD Mechanical Content library. Bills of materials, Parts lists. – 6 h
15. Drawing of the welded construction. Adding welding symbols. Axonometry. Specification. – 4 h
16. Detail drawings of the assembly. – 6 h

17. Test. Assembly drawing. – 4 h

Requirements for awarding credit points

Students receive a final mark if they have successfully completed the tasks assigned in laboratory works and have passed 2 tests. The tasks performed in the laboratory works have to be presented. Presentation includes short oral report of each finished task as well as answers to the questions about the theoretical aspects of this topic.
Theoretical knowledge is assessed as a test.

Description of the organization and tasks of students’ independent work

Construction of joints. Drawing a detail drawing using complex sections. Construction of surface intersection lines in detail drawing. Drawing of threaded parts.

Criteria for Evaluating Learning Outcomes

A student will get a successful mark in test if at least 50% of the tasks in the component/assembly drawing and tests are properly solved. The student receives high mark if the tasks performed in the laboratory and independent works are completed, well-designed and the student is able to answer the questions.

Compulsory reading

1. Plantenberg K. Engineering Graphics Essentials with AutoCAD 2018. Instruction. Mission, KS: SDC Publications, 2017. 950 p.
2. Onstott S. AutoCAD 2018 and AutoCAD LT 2018 Essentials. Sybex, 2017. 432 p.

3. Omura G., Benton B.C. Mastering AutoCAD 2018 and AutoCAD LT 2018. San Francisco etc.: Sybex, 2017. 1052 p.
4. Dukulis I. Pamati darbā ar AutoCAD 2018: mācību e-grāmata. Jelgava, 2018. 178 lpp.

Further reading

1. Simmons C., Phelps N. The essential guide to technical product specification: engineering drawing. BSI British Standards Institution. London: BSI, 2009. 204 p.
2. Čukurs J., Nulle I., Dobelis M. Inženiergrafika. Mašīnbūves rasēšana: Mācību grāmata. Rīga: RaKa, 2008. 256 lpp.
3. Čukurs J., Viļumsone I., Nulle I. Inženiergrafika (Tēlotājas ģeometrijas pamati, projekciju rasēšana. Konstruktoru dokumentācija. Datorizētās projektēšanas pamati). Jelgava: LLU, 2008. 416 lpp.
4. Čukurs J., Vronskis O. Tehniskā grafika: Mācību grāmata. Rīga: RaKa, 2008. 266 lpp.

Notes

The study course is included in the compulsory part of the bachelor’s study programme “Biosystems Machinery and Technologies”. 1st year, 1st semester.